In ground state of $$C{u^ + }.$$  The no. of shells occupied, subshells, filled orbitals and unpaired electrons respectively are :

Solution :
The ground state electronic configuration, of $$C{u^ + }\,ion$$   is $$1{s^2},2{s^2},2{p^6},3{s^2},3{p^6},3{d^{10}}$$
$$n = 3$$  ( number of shells ) ; Number of subshells occupied $$= 6,$$  Number of filled orbitals $$= 14 ;$$  There is no unpaired electron.